openpencil/tests/engine/cli/eval.test.ts

import { describe, expect, test, setDefaultTimeout } from 'bun:test'
import { randomUUID } from 'crypto'
import { tmpdir } from 'os'
import { join } from 'path'

import { cliSourcePath, repoPath } from '#tests/helpers/paths'
import { heavy } from '#tests/helpers/test-utils'

setDefaultTimeout(30_000)

const CLI = cliSourcePath('index.ts')
const FIXTURE = repoPath('tests/fixtures/gold-preview.fig')

async function run(
  args: string[],
  stdin?: string
): Promise<{ stdout: string; stderr: string; exitCode: number }> {
  const proc = Bun.spawn(['bun', CLI, ...args], {
    stdout: 'pipe',
    stderr: 'pipe',
    stdin: stdin ? Buffer.from(stdin) : undefined
  })
  const [stdout, stderr] = await Promise.all([
    new Response(proc.stdout).text(),
    new Response(proc.stderr).text()
  ])
  const exitCode = await proc.exited
  return { stdout: stdout.trim(), stderr: stderr.trim(), exitCode }
}

heavy('eval CLI', () => {
  test('returns page name', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--code',
      'return figma.currentPage.name'
    ])
    expect(exitCode).toBe(0)
    expect(stdout.length).toBeGreaterThan(0)
  })

  test('returns primitive number', async () => {
    const { stdout, exitCode } = await run(['eval', FIXTURE, '--code', 'return 42'])
    expect(exitCode).toBe(0)
    expect(stdout).toBe('42')
  })

  test('returns page count', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--code',
      'return figma.root.children.length'
    ])
    expect(exitCode).toBe(0)
    const count = parseInt(stdout, 10)
    expect(count).toBeGreaterThan(0)
  })

  test('findAll queries nodes', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      'return figma.currentPage.findAll(n => n.type === "TEXT").slice(0, 3).map(n => ({ name: n.name, type: n.type }))'
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(Array.isArray(data)).toBe(true)
    expect(data.length).toBeGreaterThan(0)
    expect(data[0].type).toBe('TEXT')
  })

  test('create frame and return properties', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      `const f = figma.createFrame(); f.name = "Test"; f.resize(300, 200); return f`
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(data.name).toBe('Test')
    expect(data.width).toBe(300)
    expect(data.height).toBe(200)
    expect(data.type).toBe('FRAME')
  })

  test('auto-layout script', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      `const f = figma.createFrame()
       f.layoutMode = "VERTICAL"
       f.itemSpacing = 8
       f.paddingTop = f.paddingBottom = 16
       return { layoutMode: f.layoutMode, itemSpacing: f.itemSpacing, paddingTop: f.paddingTop }`
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(data.layoutMode).toBe('VERTICAL')
    expect(data.itemSpacing).toBe(8)
    expect(data.paddingTop).toBe(16)
  })

  test('text node with characters', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      `const t = figma.createText()
       t.characters = "Hello"
       t.fontSize = 24
       return { characters: t.characters, fontSize: t.fontSize }`
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(data.characters).toBe('Hello')
    expect(data.fontSize).toBe(24)
  })

  test('top-level await works', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--code',
      'await figma.loadFontAsync({ family: "Inter", style: "Regular" }); return "ok"'
    ])
    expect(exitCode).toBe(0)
    expect(stdout).toContain('ok')
  })

  test('stdin reads code from pipe', async () => {
    const proc = Bun.spawn(['bun', CLI, 'eval', FIXTURE, '--stdin'], {
      stdout: 'pipe',
      stderr: 'pipe',
      stdin: 'pipe'
    })
    proc.stdin.write('return figma.currentPage.name')
    proc.stdin.end()
    const [stdout, stderr] = await Promise.all([
      new Response(proc.stdout).text(),
      new Response(proc.stderr).text()
    ])
    const exitCode = await proc.exited
    if (exitCode !== 0) throw new Error(`exit ${exitCode}: ${stderr}`)
    expect(stdout.trim().length).toBeGreaterThan(0)
  })

  test('--json outputs valid JSON', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      'return { a: 1, b: "two" }'
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(data).toEqual({ a: 1, b: 'two' })
  })

  test('syntax error exits with error', async () => {
    const { exitCode, stderr } = await run(['eval', FIXTURE, '--code', 'return {{{'])
    expect(exitCode).not.toBe(0)
    expect(stderr.length).toBeGreaterThan(0)
  })

  test('runtime error exits with error', async () => {
    const { exitCode, stderr } = await run(['eval', FIXTURE, '--code', 'throw new Error("boom")'])
    expect(exitCode).not.toBe(0)
    expect(stderr).toContain('boom')
  })

  test('no code exits with error', async () => {
    const { exitCode, stderr } = await run(['eval', FIXTURE])
    expect(exitCode).not.toBe(0)
    expect(stderr).toContain('code')
  })

  test('undefined result produces no output', async () => {
    const { stdout, exitCode } = await run(['eval', FIXTURE, '--code', 'figma.createFrame()'])
    expect(exitCode).toBe(0)
    expect(stdout).toBe('')
  })

  test('--output writes file', async () => {
    const outFile = join(tmpdir(), `eval-test-${randomUUID()}.fig`)
    const { exitCode, stderr } = await run([
      'eval',
      FIXTURE,
      '--quiet',
      '--code',
      'const f = figma.createFrame(); f.name = "Written"',
      '-o',
      outFile
    ])

    // exportFigFile may fail on files with COMPONENT nodes (Kiwi schema limitation)
    // but the eval itself should succeed — verify it at least attempted to write
    if (exitCode === 0) {
      const stat = Bun.file(outFile)
      expect(await stat.exists()).toBe(true)
      expect(stat.size).toBeGreaterThan(0)
    } else {
      expect(stderr).toContain('NodeType')
    }
  })

  test('array of nodes serializes', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      `const a = figma.createFrame(); a.name = "A"
       const b = figma.createRectangle(); b.name = "B"
       return [a, b]`
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(Array.isArray(data)).toBe(true)
    expect(data[0].name).toBe('A')
    expect(data[1].name).toBe('B')
  })

  test('getNodeById on real file', async () => {
    const { stdout, exitCode } = await run([
      'eval',
      FIXTURE,
      '--json',
      '--code',
      `const page = figma.currentPage
       const first = page.children[0]
       const found = figma.getNodeById(first.id)
       return { same: found.id === first.id, name: found.name }`
    ])
    expect(exitCode).toBe(0)
    const data = JSON.parse(stdout)
    expect(data.same).toBe(true)
  })
})